Zion is an adventurer who lives with girl Lina. One day a mysterious person brings him a shining gem and calls it a present to his excellency Zion from his majesty. His best friend Tolland appears from the stone and requests to go to imperial capital and revive the Agarta Empire together. Tolland restores a part of Zion's power, burns down the village to cut off the road back and disappears in a flash.

[From vndbreview]